My forman gave me this question . Maybe he just play'm with me but here it goes:
You have 5 wires run from the basement of a building to the roof. Your on the roof. You can go to the basement and come back to the roof only once. How can you use a continuity tester to determine which wire in the basement is the same wire on the roof. In otherwords, how could you ring out all five wires by only going from the roof to the basement and back to the roof.
. -Erik
